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If you use the Halton method to find a set of samples for each pixel, won't each pixel wind up with the same arrangement of points (since the Halton sequence always spits out the same array of numbers for a given base)? On the one hand you could use different bases, like for one pixel do Phi2 and Phi3 and for another pixel do Phi3 and Phi5...but there are only so many combinations like that you can do without going into super high bases (which as the next slide shows gives bad results). So how would you get around this problem?